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Navigation with magnetic nanoparticles: magnetotactic bacteria and magnetic micro-robots

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TLDR
In this article, a review of the magnetic interaction energies and the corresponding forces involved in the formation of magnetosomes is presented, and the propulsion of synthetic micro- or nanopropellers based on magnetic nanoparticles is briefly discussed.
Abstract
Magnetotactic bacteria navigate in the magnetic field of the Earth by aligning and swimming along field lines with the help of special magnetic organelles called magnetosomes. These organelles contain magnetic nanoparticles and are organized into chain structures in cells. Here we review recent work on the formation of these chains and provide some estimates of the magnetic interaction energies and the corresponding forces involved in this process. In addition, we briefly discuss the propulsion of synthetic micro- or nanopropellers based on magnetic nanoparticles.

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Journal ArticleDOI

Biohybrid robotics with living cell actuation.

TL;DR: Up-to-date studies concerning biohybrid robots with various biological actuators such as contractile cells and microorganisms are presented and the applications, especially the biomedical applications, of the biohybrids including drug delivery, bioimaging, and tissue engineering are focused on.
Journal ArticleDOI

Magnetotactic bacteria for cancer therapy

TL;DR: The progress and perspectives of this emerging research field are reviewed and the main challenges to overcome are discussed before the use of MTB can be successfully applied in the clinic.
Journal ArticleDOI

Magnetotaxis Enables Magnetotactic Bacteria to Navigate in Flow.

TL;DR: Using microfluidics and high-speed imaging, it is revealed that magnetotaxis enables directed motion of Magnetospirillum magneticum over long distances in flow velocities ranging from 2 to 1260 µm s-1 , corresponding to shear rates relevant to both aquatic environments and biomedical applications.
Journal ArticleDOI

Biosynthesis of magnetic iron oxide nanoparticles: a review.

TL;DR: The main biosynthesis protocols applied in the synthesis of iron oxide nanoparticles are discussed and a discussion on the challenges for a second stage perspective which would be a large scale production is given.
Journal ArticleDOI

Magnetotactic Bacteria and Magnetosomes: Basic Properties and Applications

TL;DR: Magnetotactic bacteria (MTB) belong to several phyla and exhibit the ability of magneto-aerotaxis as mentioned in this paper, which accounts for the growing interest in MTB and magnetofossils in paleo-and rock magnetism and in a wider field of biogeoscience.
References
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Journal ArticleDOI

Microscopic artificial swimmers

TL;DR: It is shown that a linear chain of colloidal magnetic particles linked by DNA and attached to a red blood cell can act as a flexible artificial flagellum, which induces a beating pattern that propels the structure, and that the external fields can be adjusted to control the velocity and the direction of motion.
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Type IV pili and twitching motility.

TL;DR: Twitching motility is a flagella-independent form of bacterial translocation over moist surfaces that is important in host colonization by a wide range of plant and animal pathogens, as well as in the formation of biofilms and fruiting bodies.
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Controlled propulsion of artificial magnetic nanostructured propellers.

TL;DR: The construction and operation of chiral colloidal propellers that can be navigated in water with micrometer-level precision using homogeneous magnetic fields are reported.
Journal ArticleDOI

Magnetosome formation in prokaryotes

TL;DR: Progress has been made in elucidating the molecular, biochemical, chemical and genetic bases of magnetosome formation and understanding how these unique intracellular organelles function.
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